La description

All Coil heaters by Gräff are also available with a built in thermocouple. The standard built in thermocouple is a Fe-CuNi Type J. Moreover, the version can also be supplied with a thermocouple Ni-CrNi Type K at short notice. Standard version spiral pipe cartridges by Gräff are equipped with a nickel-plated copper litz wire and PTFE-insulated. Litz wire length 1000mm. Other connection types can be supplied at short notice at customer request.''